More on one-offs.
Most notably card draw. So far a single Spiral Technique you can use Heaven Eclipse to try finding it easier.
Remember reading something on Cryogenesis.
A deck having a single copy of vespyr A (snowchaser) and a different vespyr B (some big vespyr). So when Cryogenesis is used there will be a 50% chance on getting what you want. When one of the cards is already drawn, then Cryogenesis is 100% guaranteed to get the other card. So the single copies of each vespyr makes what is drawn from Cryogensis quite consistent but with variety controlled to a certain degree.
Then more stuff read somewhere .
Having a one-off card as a similar “4th copy” of a card.
So for example having 3 Tempest and 1 Skorn. Tempest being the “better card” and Skorn being the similar card. Here thinking 3 AOE cards is not enough, you want 4 AOE cards. Since Tempest is “better” you want more Tempest and less Skorn.
PS: @isbee If not already, your FAQ should explain common abbreviations like AOE = “Area Of Effect” and FAQ = “Frequently Asked Questions” .